SelectCount (XmlDoc/XmlNode function): Difference between revisions

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[[Category:XmlNode methods|SelectCount function]]
[[Category:XmlNode methods|SelectCount function]]
[[Category:XmlDoc API methods]]
[[Category:XmlDoc API methods]]
[[Category:System methods]]
<!--DPL?? Category:XmlDoc methods|SelectCount function: Count of selected nodes-->
<!--DPL?? Category:XmlDoc methods|SelectCount function: Count of selected nodes-->
<!--DPL?? Category:XmlNode methods|SelectCount function: Count of selected nodes-->
<!--DPL?? Category:XmlNode methods|SelectCount function: Count of selected nodes-->

Revision as of 20:01, 31 December 2010

Count of selected nodes

SelectCount is a member of the XmlDoc and XmlNode classes.

This method counts the number of nodes selected by an XPath expression.

Syntax

  %count = nr:SelectCount(XPath)

Syntax Terms

%count
A numeric variable for the number of nodes on XmlNodelist nlis.
nr
An XmlDoc or XmlNode, used as the context node for the XPath expression. If an XmlDoc, the Root node is the context node.
XPath
A Unicode string that is an XPath expression that results in a nodelist. The count of nodes in this nodelist is returned. Prior to Sirius Mods version 7.6, this is an EBCDIC string.

Usage Notes

  • If the result of the argument XPath expression (XPath) is empty, zero is returned.

Examples

  • In the following example, SelectCount counts the “a” node children of node “top,” then the text node children of those “a” nodes:
        Begin
        %doc is Object XmlDoc
        %j is Float
        %k is Float
        %doc = New
        %doc:LoadXml('<top> <a>a1</a> <a>a2</a> <a>a3</a> </top>')
        Call %doc:Print('/')
        %j = %doc:SelectCount('/top/a')
        %k = %doc:SelectCount('/top/a/text()')
        Print %j ' and ' %k
        End
    

    The example results follow:

        <top>
           <a>a1</a>
           <a>a2</a>
           <a>a3</a>
        </top>
        3 and 3
    
  • The following statements count all the nodes in the document and all the attributes in the document, respectively.
        Print 'Count of non-attribute nodes:' And %doc:CountSelected('//node()')
        Print 'Count of     attribute nodes:' And %doc:CountSelected('//@*')
    

Request-Cancellation Errors

  • XPath is invalid.
  • Insufficient free space exists in CCATEMP.


See Also

  • ?? reftxt=Count refid=count. counts the number of nodes on an XmlNodelist.
  • For more information about using XPath expressions, see XPath.